SOLID STATE LIGHT WITH OPTICAL DIFFUSER AND INTEGRATED THERMAL GUIDE

• US 20120194054A1
• Filed: 02/02/2011
• Published: 08/02/2012
• Est. Priority Date: 02/02/2011
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Johnston, Raymond P., Kristoffersen, Martin, Meis, Michael A., Brott, Robert L.
• Application Number:
  US13/019,498
• Publication Number:
  US 20120194054A1
• Time in Patent Office: Days
• US Class Current: 313/46
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 29/506 of globes, bowls or cover glasses
• CPC Class Codes: F21V 29/673 the fans being used for intake
• CPC Class Codes: F21V 29/777 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 7/0066 specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified F21V7/16 - F21V7/30 take precedence
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01J 61/52 Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space heating or cooling arrangements to promote ionisation for starting H01J61/54
• CPC Class Codes: H01J 7/24 Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space

Abstract

A solid state light having a solid state light source such as LEDs, an optical diffuser, and a thermal guide. The diffuser receives and distributes light from the light source, and the thermal guide is integrated with the optical diffuser for providing thermal conduction from the solid state light source and dissipating heat through convection and radiation for cooling the light. The interior surface of the optical diffuser can have extraction features for providing uniform distribution of light.

Claims

1. A light with an integrated optical diffuser and thermal guide, comprising:

a light source;

an optical diffuser in communication to the light source for receiving and distributing light from the light source; and

a thermal guide integrated with the optical diffuser for providing thermal conduction from the light source for cooling the light,

wherein the light source is mounted on the thermal guide.

2. The light of claim 1, wherein the light source comprises one or more of the following:

a light emitting diode; and

an organic light emitting diode.

3. The light of claim 1, further comprising a circuit for providing power to the light source.

4. The light of claim 1, wherein the thermal guide has a central core connected with external fins.

5. The light of claim 4, wherein the fins are curved and conform to a shape of the optical diffuser.

6. The light of claim 4, wherein the light includes light emitting diodes between each of the fins.

7. The light of claim 1, wherein the optical diffuser has an air passage.

8. The light of claim 1, wherein the optical diffuser comprises an upper portion and a lower portion, wherein the upper portion is separable from the lower portion.

9. The light of claim 1, wherein the optical diffuser comprises a left portion and a right portion, wherein the left portion is separable from the right portion.

10. The light of claim 1, further comprising a reflective film located on the top edge of the optical diffuser.

11. The light of claim 1, wherein the thermal guide has a reflective surface.

12. The light of claim 1, further comprising a coating applied to an external surface of the thermal guide, wherein the coating is reflective to visible light and emissive to infrared light.

13. The light of claim 1, wherein the light source is mounted directly on the thermal guide.

14. The light of claim 1, wherein the light source is mounted on a circuit, and the circuit is mounted directly on the thermal guide.

15. The light of claim 1, wherein the optical diffuser has a roughened internal surface.

16. The light of claim 1, further comprising a functional coating applied to the optical diffuser.

17. A light with integrated optical and thermal guides, comprising:

a light source;

an optical guide coupled to the light source for receiving and distributing light from the light source;

a thermal guide integrated with the optical guide for providing thermal conduction from the light source for cooling the light; and

a functional coating applied to the optical guide.